diff --git a/src/search.cpp b/src/search.cpp
index 047a0892..9919b0cc 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -932,7 +932,7 @@ moves_loop: // When in check, search starts from here
       else if (   PvNode
                && pos.rule50_count() > 18
                && depth < 3 * ONE_PLY
-               && ss->ply < 3 * thisThread->rootDepth / ONE_PLY) // To avoid too deep searches
+               && ++thisThread->shuffleExts < thisThread->nodes.load(std::memory_order_relaxed) / 4)  // To avoid too many extensions
           extension = ONE_PLY;
 
       // Passed pawn extension
diff --git a/src/thread.cpp b/src/thread.cpp
index 2f1237a3..e5043b6e 100644
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -191,7 +191,7 @@ void ThreadPool::start_thinking(Position& pos, StateListPtr& states,
 
   for (Thread* th : *this)
   {
-      th->nodes = th->tbHits = th->nmpMinPly = 0;
+      th->shuffleExts = th->nodes = th->tbHits = th->nmpMinPly = 0;
       th->rootDepth = th->completedDepth = DEPTH_ZERO;
       th->rootMoves = rootMoves;
       th->rootPos.set(pos.fen(), pos.is_chess960(), &setupStates->back(), th);
diff --git a/src/thread.h b/src/thread.h
index 114769d2..c11d1787 100644
--- a/src/thread.h
+++ b/src/thread.h
@@ -59,7 +59,7 @@ public:
 
   Pawns::Table pawnsTable;
   Material::Table materialTable;
-  size_t pvIdx, pvLast;
+  size_t pvIdx, pvLast, shuffleExts;
   int selDepth, nmpMinPly;
   Color nmpColor;
   std::atomic<uint64_t> nodes, tbHits, bestMoveChanges;